Climate averages 1991–2020
Ōmihachiman weather
in July.
A hot, very wet month: the 2nd warmest and the wettest of the year.
Long-term climate patterns, not a forecast for a particular trip.
July is a hot month in Ōmihachiman: daytime highs average 28.9°C and nights cool to about 21.8°C. By daytime temperature it is the 2nd warmest of the 12 months.
Expect about 210 mm of rain on roughly 16 days, which makes July a very wet month (the wettest month of the year). Daylight, from sunrise to sunset, lasts about 14 h 16 min on an average July day.
The nearest other city in this atlas is Youkaichi (9 km away). In July its highs average 28.9°C, about as warm as Ōmihachiman, with 214 mm of rain.
Among the 303 cities listed in Japan, Ōmihachiman ranks joint 81st of 303 for the warmest July highs and 167th of 303 for the driest July (rainfall, lowest first). The mean July high of those 303 cities is 27.9°C; Ōmihachiman is 1.0°C warmer than that mean.
From July to August, average highs rise by 1.3°C to 30.2°C, and monthly rainfall falls from 210 mm to 122 mm.
The annual picture
July in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Ōmihachiman climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 7.1°C0.0°C | 0.0°C | 81 | 13.9 | 10.110 h |
| February | 8.0°C0.0°C | 0.0°C | 78 | 13.0 | 10.911 h |
| March | 11.8°C2.6°C | 2.6°C | 116 | 13.5 | 11.912 h |
| April | 17.2°C7.4°C | 7.4°C | 123 | 11.6 | 13.113 h |
| May | 21.9°C12.6°C | 12.6°C | 148 | 11.6 | 14.014 h |
| June | 25.3°C17.3°C | 17.3°C | 186 | 14.0 | 14.514 h |
| July, selected | 28.9°C21.8°C | 21.8°C | 210 | 15.9 | 14.314 h |
| August | 30.2°C22.8°C | 22.8°C | 122 | 12.3 | 13.513 h |
| September | 26.2°C19.1°C | 19.1°C | 179 | 12.3 | 12.412 h |
| October | 20.5°C13.2°C | 13.2°C | 152 | 10.8 | 11.311 h |
| November | 15.1°C7.5°C | 7.5°C | 81 | 9.0 | 10.410 h |
| December | 9.6°C2.4°C | 2.4°C | 75 | 11.6 | 9.810 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
July in nearby cities
- Youkaichi in JulyJapan · 9 kmHigh 28.9°C · Low 21.9°C · 214 mm rain
- Moriyama in JulyJapan · 12 kmHigh 29.1°C · Low 21.9°C · 181 mm rain
- Kusatsu in JulyJapan · 17 kmHigh 29.3°C · Low 22.0°C · 181 mm rain
- Kōka in JulyJapan · 17 kmHigh 29.0°C · Low 21.9°C · 214 mm rain
- Hikone in JulyJapan · 19 kmHigh 28.3°C · Low 22.0°C · 256 mm rain
- Ōtsu in JulyJapan · 25 kmHigh 29.0°C · Low 21.6°C · 239 mm rain
- Nagahama in JulyJapan · 32 kmHigh 28.4°C · Low 22.1°C · 287 mm rain
- Kyoto in JulyJapan · 33 kmHigh 29.4°C · Low 22.1°C · 239 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Ōmihachiman) is explained once on the Ōmihachiman year overview and on the Sources, method and limits page.